How the DGT's position has evolved
Current position
The deduction of passenger car expenses requires that the vehicle be an asset used for the economic activity through exclusive use for professional purposes. As it is not one of the activities listed under legal exceptions, simultaneous use for private purposes prevents deductibility. In Corporate Income Tax (IS), renting is deductible if the requirements for accounting registration and documentary justification are met. Regarding Value Added Tax (IVA), there is a presumption of 50% business use once the use for the activity has been proven.
The DGT's position remains constant throughout most of the sequence, requiring exclusive use for the deductibility of passenger car expenses. No changes are observed in the interpretation of exclusive use until ruling V1045-26, which introduces clarifications regarding the treatment of renting and the presumption of business use for IVA.
Turning points
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Introduces the 50% presumption of business use for IVA and establishes specific requirements for the deductibility of renting in Corporate Income Tax (IS).
Analysis based on 23 of 24 rulings with a stated position. Updated 24 September 2026.